Hi @farmaken I'm sorry to hear that you are experiencing crashes in Assassin's Creed Valhalla.
Could you take a look at the PC troubleshooting article and run through all the steps listed then try again if you haven't already done so. The support article contains some of the most common fixes for crashes, freezing, FPS drops and more.
Also have you tried lowering the World details settings? Do you only encounter the crash when that option is set to ultra high?
If the issue persists please let us know.